3
Electronic steering lock with mount - passive key and
PATS transmitter/receiver unit
Comments:
for emergency start function
4
Radio frequency receiver
Comments:
Signal is only executed in
GEM 8
Starting deactivation relay
System Operation
Smart Start
The PCM enables the starting process when a key providing a valid code is read via the PATS. This code is then verified in the GEM and compared with the saved code. If this code is recognized as correct, synchronization with other modules is carried out. After successful synchronization, the engine is cleared to start in the PCM. The PCM connects earth to the starter relay, which then connects power to the starter solenoid. As soon as the engine reaches a certain speed, the PCM disconnects the starter relay and so turns off the starter. This protects the starter.
If the engine does not turn or turns only slowly, the starting process is aborted by the PCM.
The starter is not activated if:
- the engine is running (i.e. the engine speed is above a particular value),
- the PATS does not permit the engine to be started,
- the clutch pedal is not operated (vehicles with manual transmission),
- the gear selector level is not set to P or N (vehicles with automatic transmission),
- the brake pedal is not operated (vehicles with automatic transmission).
Emergency starting function
If the keyless vehicle system is unable to recognize the passive key, the vehicle can be started via the emergency starting function.
In this case, there is a passive key mount on the steering wheel. A PATS transmission/reception unit is attached to this.
To start the engine, the passive key must be inserted into the passive key mount. The Start/Stop button can then be used to turn on the ignition and start the engine as normal. To deactivate the PATS, a transponder is fitted in the passive key, which is read by the transmission/reception unit.
